Continuous filter.



N0.893",1o4. A PATENTED JULY 14, 19,08.y

' R. scHoRR. f y

GoNTINUoUs FILTER.

APPLIOATION FILED MABU'BO, 1907.

` 4 2 SHEETS-SHEET 1,

R. SCH'ORR. CONTINUOUS FILTER.

APrLIoATIoN HLBD MAR. so, 1907.

PATENTED JULY 14, 1908.

2 SHEETS-SHEET 2.

A440# ne).

y z op I chine; Fig. 2 -is an enlarged longitudinal secsecured pairs of cleats 12 each pair forming a `canvas, being sewed around theframe, and

nnrrnn strains rrr con'rrnir'ous FILTER.

No. 893,104. Specification of Letters Patent. p Patented July 14, 1908.

Appennini mea Marcil so, i907. Sernin. 365,594..-`

To allwhom 'Lt may concern: f; A' unit thus .formedare effective filters. To

Be it known that I, ROBERT Sonoma a` prevent the bendingof the ilter frames are citizen of the United States, residing at San provided supports 16 Franc`isco,in` the county of San Francisco I around the central and State of California, have invented new shaft 6 and. said filter and useful Improvements in Continuous Filters, of which the following is a specification. The object of the 'present invention is to provide a filter especially ada ted for cyaniding or similar uses, which will be entirel automatic in its operation, that is to say, wi l withdraw the solution and form cakes of the material previously suspended therein, wash said cakes, and then discharge the same as tailings, and will repeat these operations in the order namedfor van' indefinite period; Vwhich can be installed without requiring extensive excavation or grading; which will provide a laree amount of filter area in proportion to the vfloor space occupied, which will require little attention, and which may be operated at a small expenditure of power. In the accompanyin f drawings, Figure 1 is a transverse vertica section of the maof .filtering surface is obtained. The interior means of pipes 20 with an iron ring 21 whic revolves with the wheel upon the hollow ivot at the corresponding end. Said pivot is divided by transverse walls 23 and three longitudinal` walls 25 into three chambers 26, 27, 2S, each chamber being connected with a separate pipe. Thus the chamber 26 is connected by a pipe 29 with a suction pump, not shown, for. drawing off the solution. The other chamber 27 is connected by a pipe 30 with a water suction pump, not shown, for drawing 0H the wash water, and the chamber 28 is connected by a pi e 3 with a force pump, not shown, for supp ying pressure water. Thus the radial pipes 20, connected to the several filter units, perform in succession three functions. Firsthrthe draw off the solution in which the materia was suspended, thereby forming cakes; next they serve to draw `off the water with which the cakes are washed; and, lastly, they serve to discharge the washed cakes by forcing them off by means of pressure Water or compressed air. The washwater is supplied by pipes 34, having outlets from which the water flows on to the material in the top of vthe wheel.

35 represents a tailin the washed cakes are iscliarged. In said launder the tailings may be carried. away either mechanically or by means of water.

An suitable means -may b'e used to rotate the ter wheel. The one shown consists of a shaft 36 rotatabl mounted on extensions of the sides of the ox 1, driven by a pulley 37 from any suitable source of ower, an carrying eccentrics 38 connecte with rods 39, the other ends of which are adjustabl connected with arms' 40 swin ing on the ho low pivots, and carrying pavs 41 which engage ratclietteeth 42 on the outer sides of the outer disks. This construction is adapted for a slow rotation of the wheel with a small expenditure of power. l

The operation is as follows-The pulp, or the sliines from reduction machineryjis led tionvthrough one of the hollow pivots; Fig. 3 is a transverse section of the saidpivot; Fig. 4 is a transverse sectiontliereof in. the plane of the radiatin tubes, looking inthe osite direction to ig. 3; Fig. 5 is a longitu inal section of the machine on the same scaleas Fig. 1'; Fig. 6 is a broken perspective view of one of the filter pivots.

Referring to the drawing, 1 indicates a tank or box which forms a receptacle for the pulp, said box having a sloping bottom 2. upported upon upper and lower beams 3, 4, at each side of the box is Aahollow ivot5, said pivots being connected by a sha t 6, and upon the center of said shaft is also secured a cylindrical bearing 7.. Upon the inner ends of the pivots 5 and upon the bearing 7 rotates the lter'wheel 8, which consists of three disks connected `to ether by longitudinal steel rods 10. On ie 'face of the disk are groove, said cleats and grooves arranged in a direction tangential to a circle of smallerv diameter than the wheel. In said grooves are supported the filter units 13, each unit con sistin of a frame 14 made of standard pi e cast iron, or Wood, filter cloth, preferably mattin or other'porous material filling the s ace etween the two-sides of this filter c oth. Both of the cloth sides of each filter yhigh as the launder 35 for the tailings. The

frames arev tiedl at the circumference by steell of the lter units are severally connected b launder intovwhich extendingfrom hubs 17 -Y into the box 1 and its level is maintained as Wheel rotates in the' direction of the arrow l shown in Fig. 1, and during the very slow movement of the lter umts through the pulp between the points 11,1), the pipes eonneeted with the filter units are all connected l pipe 29, is connected with the solution e.\'- iaust pump. Consequently, at this time, Cakes are formed on the cloth sides ot' the 'lter units, as the pulp is drawn up against the filtery eloth by reason of the vaeuuiii formed in the interior ol the 'filter units and the` solution is drawn through the elotli. As the filter units emerge from the box at the l oint l), the Corresponding Jipes 2t) ai'e no enger connected with the eliamber 26, but are now connected with the chamber 27. .it l the 'Same time the material lying' between the t tilter uiiitsis washed by water diseharged thereon 'from the wash water pipes 34. This t water is drawn through the tiltei' eloth into the interior ot' the filter units, and thence by l means of the pipes 2t), corri-spendingr to Isaid filter units, into the ehaniber 27, and thenee ,i by the pipe 3() to the water suction pumps. The several filter units are. operated upon'in i this manner until they arrive at such a posii tion, marked c in Fig. l, that they slopefy downwards in the direction of the tailings launder 35. The pipes 2t) Aconnected with the iilter units passingr this point in sucresi sion are now shut off' from the elianiber 27 and are connected with the chamber 2S, i which ehan'iber, by means of' the pipe 31 is i coniieeted with a force pump or with an aii' compressor. By this means pressure water or eoi'npressed air is admitted, first to the interior of the filter units, and then outward through the filter eloth, Yasliiiig all the taillj ings ofll 'from said filter eloths and disehargi ini,r them into the launder'. As the tail'- ings are com letely discharged from. said 'f'ill ter units, saitlf units arrive again at the point e, at which. they begin to pass through the l ses,

pulp. and the operation is thusl repeated by ene 1 filter unit. iii succession.

l Claiml. ffii an apparatus of the eharaeter dif-- scribed, the ,fom'ninatioii of' a hollow pivot, a vfilter wheel rotatably supi'ioi'ted thereon, a eireulai' series of filter units` carried by .said Vfilter wheel, means` for supplying to said filter units the material to be filtered, means for drawing the filtered liquid from said units eoniirii'isiiie eoiidiiits leading' from ,said pivot severally to the. interiors of' said units. a pipe leadiiij;A to the vfilter wheel, and means whereby, in the rotation of' ,said wheel. `said ronduits are eoiiiieeted iii siieeessioii to .said pipe, substantially as desei ibed` 2. ln,aii apparatus` of the ehai'aeter deA scribed, the eoiiibination of a wheel, a eireiilar series of filter units rairied thereby, said units o\f'erlappiii, one another, and means,

y automatieally operated iii the rotation of the wheel, for passingfhiids in opposite dii'ei't ione alternately through lsaid filtei' units, subs-tain tially as desei'ibed.

I). ln an apparatus of the eharaetei' desi'ribed, the i-onibiiiation ofI ay rotating' wheel a series of hollow filters earried thereby, z i'eeeptarle adapted to eontaiii the material to be filtered, hollow' lifter unitseontartiiig' in 1 succession with the material in said i'eeeptaele', eoiidiiits severally eoiiiieeting with said ,filter uiiits, a. ringe` with nhieh the eoiidiiits eoiiiieet at the outer ends. a hollow' pivot. upon whii'h Isaid ring' rotatesv with the wheel said pivot being divided into t'ompai'tiiieiits, and pipes roiiiieeted with the ,several rompai'tineiits. substantially as desi'i'ibed.

lii testimony whereof l hare hereunto set my hand in the presenee of two `siibseribiirer witnesses.

l-{UHICIIT Htlltthlt. v\\vitiie. ses:

hinweis Bl. Winona', 1).!3. ltit'iixiins. 

